Self-closing window.



E. R. LEONARD.

SELF CLOSING WINDOW.

' APPLICATION FILED JUNE 5. |917. 1,255,335. Pawnd Feb. 12, 1918.

2 SHEETS-SHEET I.

1f @zal me. LEONARD.

sur cLqsmt; wlimow. APPLICATION HLED JUNE. |911.

Patented Feb.12,191&

county, new and useful Improvements in Self-Clos- Aall ELOF B. LEONARD, 0F WOODCLIFF, NEW JERSEY.

SELF-CLOSING WINDOW.

Specification oi' Letters Patent.

Patented Feb. 12, 1918.

Application filed June 5, 1917. Serial No. 172,858.

To all whom it may concern.'

Be it known that l, ELor` R. LEONARD, a citizen of the United States residing at No. f 209 Thirt -fourth street, Woodcli Bergen ew Jersey, have invented certain ving Windows, of which the following is a specification. U

. My invention relates to that class of wmdows wherein thermally actuated elements are used to control the action of weights adapted when released to automat1cally close -the sashes. And my improvements are directed particularly to the arrangement of the weights and to the means for automate cally transferring the influence of aV weight or weights from the lower sash to the upper one, all of which I will proceed to describe referring in so doing to the drawings 1n all of which similar parts are designated by corresponding reference numerals Figure 1 being an inside elevation partly broken awav, ofV a window frame and sashes embodyin my invention; Fig. 2 being a side view o the casintg, partly broken away and looking to the le't on Fig. l; Fig. 3 bemg a vertical sectional view taken on the line 3-3 of Fig. 1, looking to the right; Fig. l being a detail on an enlarged scale of the `u per portion of Fig. 3, the figure being slijortened vertically bly the omission of a medial portion; and ig. 5 being a horzontal sectional view ofthe same taken on the line 5-5 looking down.

The casing 1 may preferably be made of sheet metal, in a conventional form, being provided with suitable ianges to form grooves between them for the upper and lower sashes, 2 and 4- to slide in in the usual manner.

The upper sash is balanced by weights 6, 6 connected to it by chains 7, 7, traveling over pulleys 8, 8, in the usual manner. l'he lower sash 4f is balanced by a chain 9, which is preferably carried around it, as shown by broken llnes in Fig. 1,'and 1s provided with fusible links as 10, 11 at different points in its course. T he link 10, is attached vto the chain above it by an enlarged mem- Aber, as the S hook 12, the purpose of which (will be later explained.

The chain 9 is carriedup on each side over a pulley 13 in the top of the frame, then down around a pulley 14: to which is attached a weight: 15 then up over a pulley 16 and down through the top of the casing, as shown in Fig. 4, and, a short distance below the top, the end of the chain is again prefer ably passed into the casing through a hole, as 17, which allows the slack of the chain to be disposed within the casing.

At the top of the casing, below the pulleys 13, 16 and intersecting the paths of the cham 9, is placed a key element 18, which is provided at oneend 'with a linger 19 adapted to enter a link in the chain 9, and at the other end with a loop 22, through which the chain 9 may travel freely. A flange 20 engages in a slot or recess in the top of the casin to hold the key in position, with its shou der 21 bearing against the top of the casing,

while its end is some distance below they casing. The'result of this 'arrangement is that if the looped end of the key is pushed ulp afgainst the casing, the key will rock on tle ange 20 as a plvot so as to withdraw its inger out of the link in the chain 9.

When the key is in the position shown in Fig. 4, its finger 19 locks the end of the chain with which it engages, and the lower sash is balanced by the weigths 15, 15 hanging through their pulleys 14, 14 in the loops of the chain 9 between the pulleys 13, 16 on each side of the casing.

At the side of the casing a looped arm 23 is clamped, as by a bolt 24, or other suitable means, to that part of the chain 9 which normally is just below the pulley 16 in the interior of the casing when the chain 9is held in position by the finger`19 of the key 18 as shown in Fig. 4. The loop of tne arm 23, extends over and freely surrounds the chain 7 of the upper sash, with the normal movements of which it does not interfere inasmuch as the loo ed arm is well above tno path of travel ofp the weights 6, 6. This arrangement may be duplicated on each side of the casing.

With the various parts in their normal positions the sashes can be freely raised and lowered and caused to pass each other without any .interference of their'weights, the

lower sash weights acting only on that sash and the upper sash weights only on that, sash.

if, however, the chain 9 is severed by the melting of a fusible link, the lower sash, it

raised, will fall of its own weight, andthe chain will be, immediately drawn down, by the weight l5, over the' pulley 13, into the casing until the bool( strikes the looped end of the key 18, through which its size prevents it from passing. This will trip the key 18 up and draw its linger 19 out of the link in the chain 9 freeing that end or' the chain. The weight l5 will then drag that end of the chain down within the casing car rying with it the looped arm Q3 until it encounters the weight 6 of 'the upper sash, when, if that sash is lowered the additional drag of the weight l5 will immediately overbalance it and raise the sash.

lt should be understood that preferably the arrangement of S hook, key 18, and looped arm23, which l have described in detail for one side of the casing, is duplicated on the other side, although it is practicable, in narrow and smoothly running windows,to use the S hook on one side only and to conneet it directly to the top of the lower sash by a fusible' linlt.

To readjust the balancing mechanism it isy only nccessa ry to reconnect the `released .por-v tions` of the chain by anew 'fusible linlt, and to draw back the iree ends of the chain over the pulleys i6, put the key 18 in proper position, and tuck the free ends of the chain into the casing through the openings 17 By this means l secure an eiliciently operating automatically closing window, positive in action, Simp e in readjustmenh'avoiding the necessity ot opening the casing!l to recover or rearrange released parts, and in which there is no interference, underl normal conditions. between the balancing mech.- anisms of the different sashes.

aring thus described .my invention. what l claim and desire to secure by Letters: Patent of the United States, is :H

1.*'l`he combination, in an automatically closing window, of a casing, an upper sash provided with counterbalancing means, a lower sash, count-crlfialancingmeans carrying the lower sash and embodying a dexible element Vhaving a fusible link, a' carrying pulley overy which the flexible element travels, a rcleasable datent attaching said flexible elerncnt toward one end to the casinn' a pulley traveling upon a'loop-of said flexible element between said carr ino" ulley and said releasable detent, normallysta tionary connecting means between said ilexible element and the upper sash counterlnil` ancing means, sai-d flexible element being also provided with means adapted to free the releasablc detent from the flexible element upon the parting of said fusible link.

Lacasse 2. The combination, in an automatically closing window, ot upper and lower sashes, normally independent counterbalancing means therefor. thermally governed means comiecting the lower sash to an enlarged elernient in one portion of its counterbalancing means, a hey element normally holding another portion fof such counterbnalancing means in xed position, and means brought into action by the operation. of said thermally actuated means ttor releasing said key clementthrough the engagement oil said en-- larged element therewith to cause the lower sash counter-balancing means to operate upon the upper sash.

3. The combination, in an automatically closing window, oi" upper and lower sashes, normally independent counterbalancing means therefor, thermally governed means connecting the lower sash to one portion of its couuterbalancing means, a key element, normally holding; another portion of such counterbalancing means in fixed position, connectible means between the counterbalancing means, and means brought into action by the operation of said thermally actu ated means for releasing said lrey element from the counterbalancin means to cause the lower sash counterbaincing means to operate upon the upper sash through said connectible means.

4.' 'l` he combination, in an autoinatically f closing window, ot an upper sash provided with counterbalancing "weights and chains, a lower sash, a counterbalancing chain supporting' the lower sash and embodying a tripping element and a fusible link. carrying pulleys over which said chain is carried to form 'a loop between them, a detenl'I do tachably attaching said chain? to the casing beyond the carrying,r pulleys, a traveling pulleyV carried by said loop, a weight carried by the traveling pulley, a normally stationary connecting element attached to they lower sash chain and adapted to connect with an upper sash weight, said tripping` element being' adapted to cause said detent to release said lower sash chain upon the parting o the fusible link, and thereby to cause the connecting elcmentto add the drag ot the lower sash weight to the upper sash weight.

5. The combination, in an automatically vclosingI vinflow, oi an upper sash provided .with countcrbalancing weights and chains,

a lower sash. a counter-balancing chain 'sup' portino,r the lower sash and embodyingon vcach side a tripping, element. and a fusible leys7 a normally stationary'connecting ele 130 ment atta 1 ;-1 to the lower sash chain at ach side and adapted to c onnect with an upper sash weight, said trlpping elements ,ding adaptefl'to cause said detentsto release 5 said lower sash chain upon the parting of n, vfusible link, and thereby to cause the connecting elements to add lower sash weights to Weights.

the drug'v of'l the the upper sash AGNES SCHAEMR. 

